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Changzhou Bonade Heat Treatment System Co., Ltd.

Carburizing Furnace, Nitriding Furnace, Industrial Furnaces manufacturer / supplier in China, offering Pit Type Tempering Furnace for Heat Treatment, Pit Type Gas Furnace Heat Treatment Furnace, Pit Type Furnaces for Nitriding and so on.

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Supplier Homepage Product Pit furnace Pit Type Tempering Furnace for Heat Treatment

Pit Type Tempering Furnace for Heat Treatment

FOB Price: US $1,000-10,000 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $1,000-10,000/ Piece
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Port: Shanghai, China
Transport Package: Wooden
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram

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Basic Info
  • Certification: CE, ISO
  • Range of Applications: Heat Treatment
  • Usage: Heat Treatment
  • Rated Power: 75kw
  • Rated Temperature: 650ºC
  • Quality (Kg): 4200
  • Specification: ф 950× 1200mm
  • HS Code: 8514101000
  • Place Style: Vertical
  • Type: Pit Furnace
  • Fuel: Electricity / Gas
  • Rated Voltage: 380V
  • Maximum Load Capacity: 1000kg
  • Trademark: bonade
  • Origin: Changzhou
Product Description
Pit Type Tempering Furnace for Heat TreatmentPit Type Tempering Furnace for Heat Treatment
Pit Type Tempering Furnace for Heat TreatmentPit Type Tempering Furnace for Heat Treatment

bonade RJ2 series of pit-type tempering resistance furnace energy-saving cycle-type electric furnace for the general metal parts in the air for tempering and aluminum die casting, piston, aluminum and other light alloy parts quenching, annealing, aging heat treatment purposes.
Structure Description: RJ2 series of pit-type tempering resistance furnace structure for the national standard pit furnace. The shell is made of steel plate and steel. The inner surface of the lid is made of stainless steel plate. Lining with ultra-lightweight 0.6g / cm3 energy-saving micro-hole fire-resistant insulation brick masonry. Lining and furnace shell sandwich aluminum silicate fiber mat insulation, the remaining gap filled into the stone powder. Resistance wire with 0Cr25Al5 high resistance alloy wire wound in a spiral installed in the furnace on the brick. Furnaces are placed with stainless steel loading baskets and guardrails. The lid is manually lifted or electric hydraulic lift. The furnace cover is equipped with heat-resistant stainless steel shaft and fan made of hot air circulation fan, so that the workpiece in the heating process, the furnace up and down the air to ensure uniform heating of the workpiece. In order to ensure the safety of operation in the vicinity of the lift mechanism with a limit switch, the switch and the electric cabinet control cabinet power interlock, when the lid is closed (work) power. When the lid is open when the limit switch that cut off the control power supply, so the power supply of the heating element at the same time cut off to ensure safe operation. (Or according to user needs, our company can be equipped with intelligent control cabinet, the furnace temperature uniformity of ± 3 ºC), thermocouple, compensation wire.
With a vertical furnace for long rod-shaped workpiece heat treatment of industrial furnace furnace section is generally round, diameter of 0.5 to 4.5 meters, the furnace up to 30 meters deep. Long rod-shaped workpiece, such as barrel, turbine spindle, generator rotor, ship spindle and other rod-type heavy workpiece, in the pit furnace is placed vertically heating, to avoid bending deformation. The furnace furnace is located on the top of the furnace, and the workpiece is suspended vertically in the furnace by special spreader. Special lifting equipment can be fast

Pit furnace

Loading and lifting the workpiece, for the convenience of operation and reduce the height of the plant, the furnace is generally all or part of the installation in the ground. Even so, equipped with deep deep furnace furnace plant, still need to build very high. Such as the original Shanghai Electric Furnace for the second heavy machinery plant in China 1.8 meters in diameter, 30 meters deep well furnace, deep underground 33.5 meters, 150 tons of bridge crane used rail surface height of 36 meters, 42 meters. With the pit furnace, it should also have the same deep quenching cooling water tank and oil tank, as well as hair or spray cooling device.

When the workpiece is quenched, the first part of the workpiece is first immersed in the cooler, and the bottom of the workpiece is the first to be immersed, the workpiece is uneven heating, affecting the quality of quenching. The usual measure is to control the upper and lower parts of the furnace to a different temperature to compensate. Since the 1920s, the aviation industry uses a pit furnace for loading and unloading workpieces from the bottom of the furnace, heating with electric heating elements, all of which are built on the ground and Move left and right on the ground track. heating
Pit type tempering furnace
Pit type tempering furnace
After the workpiece with the furnace together to move to the tank or sink above, and then start the top of the hoist on the workpiece from the furnace through the bottom of the furnace, quickly immersed in the cooling tank cooling. The workpiece from the baked into the cooling tank into the whole process and stay in the air time is very short, so less oxidation, temperature drop, the upper and lower temperature drop is basically the same, can guarantee the quality of quenching.

Pit furnace can be used gas or liquid fuel, can also be used electric heating. In the case of gaseous fuels, there are usually a number of small-energy burners installed along the tangential direction of the inner wall of the furnace, arranged evenly in a height or in a spiral form to avoid direct flushing of the workpiece by the flame to ensure uniform temperature in the furnace. When used for low temperature tempering or oil as fuel, then in the furnace with a thin muffle wall, the combustion space and heating space separated, but the muffle wall furnace, fuel consumption.

Small kiln furnace use of electric heating, most also with a special metal muffle can be carried out gas carburizing, nitriding, carbonitriding, bright annealing and other heat treatment. In a power-efficient area, or a large-scale pit furnace that requires precise control of the furnace temperature, it is more suitable for the use of electrical energy.


1) Check the furnace door or furnace cover next to the city limit switch, should ensure that the door or furnace lid after the start, the main circuit power.

2) Pit furnace should be used before the power connector to ensure good contact. Insulation of power cord meets requirements.

3) control the atmosphere resistance furnace equipped with gas flow meter and pressure gauge, to indicate accurate and sensitive.

4) access to the flammable atmosphere of the resistance furnace, to have the furnace temperature below 760 ° C alarm and the necessary interlock to avoid the explosion.

5) The grounding bolts of the furnace body should be firm and reliable.

6) Water-cooled well-type furnace should be installed water temperature, water pressure and flow relay, there is abnormal circumstances that cut off the main circuit power supply, and issued an alarm signal.

7) control atmosphere furnace explosion-proof safety device to be flexible and reliable.

8) outside the furnace shell exposed electric heating body to have a safe and reliable protective cover


1, electric furnace with a large fan device to improve the furnace temperature uniformity;

2, electric furnace sub-district control, and further improve the furnace temperature uniformity;

3, the furnace with stainless steel guide duct;

4, the lid open and close the use of lifting or automatic hydraulic opening and closing institutions, and with a guide column to ensure that the lid open and close;

5, the furnace lid and the furnace with high temperature fiber cotton production, furnace insulation performance, energy conservation, reduce production costs;

6, no pollution, good environmental benefits

product namemodelRated power (KW)Rated temperature (ºC)Rated voltage (V)PhaseWorking area size (mm)Maximum load capacity (kg)Quality (kg)
Pit type tempering resistance furnaceRJ2-25-6256503803ф400*5001501100
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Mr. Yao Zhou
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